This is the location of Estonia’s highest limestone cliff, the Ontika cliff. Approximately 55 metres high - the cliffs are almost like a stone book, opening to the viewer to reveal the layers of its various eras. A nearby observation platform, built close to the Valaste Waterfall, is the best place to view the cliff. Visitors to the area are also able to take a hike along the coastal hiking trail to discover the limestone cliff's unique forest. Did you know...?: The Ontika Limestone cliff is the highest section of the over-1,100 km-long Baltic limestone bank that starts on Sweden's Island of Öland and ends in Russia near Lake Ladoga. The longest uninterrupted portion of the limestone cliff runs 23 straight kilometres, from the Village of Saka to the vicinity of Toila.